If you mean the foundations of the scientific method, e.g. things like trusting your perception of the world (to some extent), that indeed crosses over from science into philosophy. But that does not invalidate the scientific method, not does it mean all of science is faith-based; it just means we had to make some assumptions to be able to accomplish anything at all. Those assumptions are still something we can and should question, we just don't have any good way of testing them.